Together 82965

An older digger would dig a ditch by himself in 6 hours. A younger digger can handle the same trench in 3 hours. How long would it take them to dig if they worked together?

Correct answer:

t =  2 h

Step-by-step explanation:

t (61+31)=1  t (1/6+1/3)=1  3t=6  t=36=2  t=2=2 h



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